User Guide

5
Bitmap images
Bitmap images, such as those created
in Adobe Photoshop, consist of a grid,
or
bitmap , of small squares, known as
pixels . For example, a bicycle tire in a
bitmap image is made up of a collection
of pixels in that location, with each pixel
part of a mosaic that together gives the
appearance of a tire. When working with
bitmap images, you edit pixels rather
than objects or shapes.
Bitmap images are best used for work-
ing with continuous-tone graphics, such
as photographs or images created in
painting programs. Bitmap images
are set at a fixed resolution—they are
resolution dependent. This means that
objects can appear jagged and lose
detail if they are scanned or created at a
low resolution (for example, at 72 pixels
per inch) and then enlarged or printed at
a higher resolution.
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